Robtex

Up: 145.255.232.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 145.255.233.0/25
Down right: 145.255.233.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
145.255.233.42	A+PTR	mx.sdushor3spb.ru
145.255.233.42	A	mx0.sport-school3.ru
145.255.233.42	A	mx2.sdushor3spb.ru
145.255.233.43	PTR	145-255-233-43.obit.ru
145.255.233.43	A	biathlonspb.ru
145.255.233.43	A	auto-capital.net
145.255.233.44	A	biathlonspb.ru
145.255.233.44	A	it-region.pro
145.255.233.44	A	xn--80a4agr.xn--p1ai
145.255.233.50	PTR	mx2.lidgroup.ru
145.255.233.51	PTR	gw.lidgroup.ru.233.255.145.in-addr.arpa
145.255.233.52	PTR	145-255-233-52.obit.ru
145.255.233.53	PTR	145-255-233-53.obit.ru
145.255.233.54	PTR	145-255-233-54.obit.ru
145.255.233.162	A	ibank2.stroycombank.com
145.255.233.204	A+PTR	mail.lenoblgas.ru
145.255.233.226	A+PTR	smail.appetitus.spb.ru